JP2006346258A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine which reduces the using amount of source water over a long period of time. <P>SOLUTION: The washing machine is provided with a decomposition means for housing a catalyst which modifies and/or decomposes organic contaminated objects in washing water and turning washing water discharged from a washing tub to treated water by bringing it into contact with the catalyst and an oxidizing agent generation means for generating an oxidizing agent in the washing water housed inside the decomposition means, and the treated water is returned to the washing tub and reused in a rinsing process. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a washing machine for washing clothes and the like.

  Washing machines for washing dirt such as clothes have been widely used. The operation is as a rinsing step after the washing water containing the detergent comes into contact with the laundry to release the contaminated material from the laundry, and the contaminated washing water is discharged outside the washing machine once. Water is newly supplied to wash away contaminants and detergent residues adhering to the laundry and contaminated washing water. That is, since separate source water is used in the washing step and the rinsing step, the use of a large amount of water is inevitable.

  As a washing machine that reduces the amount of source water used, a washing machine (see Patent Document 1) having an adsorption unit comprising an activated alumina that adsorbs a surfactant in washing water and a heater that heats the activated alumina, Washing machine (see Patent Document 2) equipped with a filter tank filled with an absorption filter material that absorbs contaminants contained in the wash water and filters the previous wash water. Combined with a filter carrying a photocatalyst and an ultraviolet radiation lamp There has been proposed a washing machine (see Patent Document 3) provided with a filter for filtering and purifying washing liquid.

  In any of the washing machines described in any of the patent documents, the amount of source water used is reduced by purifying water used in the washing process and circulating it to the rinsing process. In Patent Document 1, after washing water is purified with a microfiltration membrane and activated alumina in a washing process or a rinsing process, activated alumina is heated by a heater and the adsorbed surfactant is thermally decomposed to obtain activated alumina. It can be used for a long time. In Patent Document 2, a material coated with an inorganic substance having an organic substance decomposing catalyst is used as an absorption filter material, a heating means for heating the absorption filter material is provided in the filter tank, and water from the filter tank is provided after the rinsing process is completed. When discharging the washing machine outside the washing machine, the absorption means is heated by using the heating means, so that the detachment and decomposition of the contaminants from the absorption filtration medium can be promoted.

Moreover, in patent document 3, after washing water is filtered and purified with a filter in the washing process, the filter function of the filter is achieved by decomposing organic contaminants attached to the filter with ultraviolet rays and a photocatalyst after the washing process. It can be maintained over the long term.
JP-A-6-47189 JP 2000-84291 A JP 9-47598 A

  In any of the washing machines described in any of the patent documents, it is considered that the contaminants removed from the washing water undergo an oxidative decomposition reaction. When carrying out oxidative decomposition of contaminants, it is necessary for an oxidant to coexist in the reaction system in order to promote oxidative decomposition. According to Patent Document 1, the surfactant adsorbed on the activated alumina and removed from the washing water is subjected to oxidative decomposition by heating the activated alumina in a state where water is not accumulated in the adsorption unit. Although the kind of oxidizing agent is not specified in Patent Document 1, it is considered that oxygen in the air is used as the oxidizing agent.

  In the oxidative decomposition of contaminants in the absence of water disclosed in Patent Document 1, the oxidizing power of oxygen is weaker than that of other general oxidants, and therefore, hardly decomposed organic substances such as surfactants. In the decomposition, it is necessary to heat from 250 ° C. to 300 ° C. even when a metal oxidation catalyst is supported on activated alumina, and the energy required for regeneration is large, and the material of the adsorption unit is required to have high heat resistance. Furthermore, there has been a problem that surplus energy is required as the latent heat of evaporation of water remaining in the adsorption unit.

According to Patent Document 2, the contaminants absorbed and filtered from the washing water are converted into carbon dioxide gas or water by the action of the organic substance decomposition catalyst, that is, undergoes an oxidative decomposition reaction. Although the kind of oxidizing agent is not specified in Patent Document 2, it is considered that oxygen in the air is used.
In the oxidative decomposition of contaminants in the presence of water disclosed in Patent Document 2, that is, wet oxidation reaction, since the solubility of oxygen in water at normal pressure is low, means for positively introducing an oxidizing agent into the reaction system It is considered that the oxidation reaction does not proceed sufficiently in a state where no action is taken. However, in the conventional configuration, means for positively introducing an oxidant that promotes oxidative decomposition of contaminants by the organic matter decomposition catalyst coated on the absorption filter material is provided in the filtration tank filled with the absorption filter material. The oxidative degradation rate of the contaminants was not sufficient. As a result, there is a problem that the effect of desorption and regeneration of the absorbent filter material is insufficient, and it is difficult to continuously obtain filtered water having a water quality that can withstand reuse in the washing and rinsing processes. It was.

  According to Patent Document 3, organic contaminants attached to the filter and removed from the washing water are oxidatively decomposed by the photocatalyst carried on the filter surface. It is said that the oxidation reaction of the photocatalyst holes is promoted by the irradiation of ultraviolet rays. However, since the progress of the oxidation reaction by the photocatalyst is limited only to the surface of the catalyst, it is difficult to realize a highly efficient photooxidation reaction that decomposes organic substances present in a large amount of several g or more in the washing water at a high speed. In the presence of washing water, which often exhibits turbidity, there has been a problem that the energy of irradiated ultraviolet rays cannot be used effectively.

  Therefore, the present invention solves the above-described conventional problems, and by reusing the wash water used for washing into the rinse process as treated water purified to a water quality that can withstand use in the rinse process, An object of the present invention is to provide a washing machine that reduces the amount used over a long period of time. Furthermore, an object of the present invention is to provide a washing machine that improves the effect of removing the surfactant from the garment in the rinsing step by modifying the surfactant.

In order to solve the conventional problems, a washing machine of the present invention stores a drain port and a catalyst installed in a washing tub to discharge washing water, and the washing water discharged from the drain port is used as the catalyst. Decomposing means that is brought into contact with treated water, an oxidizing agent generating means for generating an oxidizing agent in the washing water that contacts the catalyst in the decomposing means, and a water supply port for supplying the treated water to the washing tub.
According to this configuration, since organic contaminants in the wash water can be decomposed and removed without performing high-temperature heating, by removing the organic contaminants in the wash water during the washing process, the source water used in the subsequent rinsing process Can be reduced. Alternatively, the rinsing process can be carried out without using new source water by reusing the cleaning water used in the washing process as treated water purified to a water quality that can withstand use in the rinsing process. The amount of use can be reduced. Further, in the rinsing step, the surfactant concentration contained in the washing water reused in the rinsing step is further reduced and / or the adsorptivity to clothing is reduced due to the modification of the surfactant. The effect of removing the surfactant from the clothes is improved.

In the washing machine of the present invention, the oxidant generating means has at least a pair of an anode and a cathode installed in the disassembling means, and a power supply unit for supplying power to the anode and the cathode, and is stored in the disassembling means. Electrolyze the washed water.
According to this configuration, it is not necessary to maintain dangerous chemicals and large-scale equipment as an oxidizer, and it is easy to manage oxidizer generation means, and it is also used in general households where it is difficult to manage chemical substances and maintain equipment. It becomes possible to do.

Further, in the washing machine of the present invention, when the electrolysis of the washing water is performed by the oxidant generating means, at least a part of the catalyst is installed above the lower end of the anode.
According to this configuration, the contact efficiency between an oxidizing agent such as hypohalous acid generated by electrolysis and the catalyst that activates the oxidizing agent is improved, and the oxidation reaction of organic contaminants can be further efficiently advanced. Become.

Furthermore, in the washing machine of the present invention, the oxidant generating means further includes an electrolysis control unit, and the voltage application to the cleaning water is performed twice or more times.
According to this configuration, hypohalous acid generated as an oxidizing agent can be prepared again by electrolysis from halide ions generated after organic contaminants are decomposed, and a halogen salt that is an electrolyte. It becomes possible to reduce the input amount of.

Furthermore, the washing machine of the present invention further includes an electrolyte supply means for supplying the halogen salt to the washing water stored in the decomposition means, and at least a part of the oxidizing agent generated by the oxidizing agent generating means is hypohalous acid. It is.
According to this configuration, it is possible to generate hypohalous acid in an amount necessary for decomposing organic pollutants in washing water by electrolysis of a halogen salt that is safe and easy to obtain, and chemical substances can be managed. Even in a general household where it is difficult, sufficient ability to decompose and remove organic contaminants can be exhibited.

Furthermore, in the washing machine of the present invention, the inside of the disassembling means is partitioned into an anode chamber containing an anode and a cathode chamber containing a cathode by a diaphragm, and the catalyst is installed in the anode chamber.
According to this configuration, it is possible to generate hypohalous acid, which is an oxidizing agent, in the state of an acid having a stronger oxidizing power on the anode chamber side where the oxidizing agent is generated by electrolysis, and the oxidation reaction of organic pollutants. Progresses efficiently.

The washing machine of the present invention also has a decomposition heating means for heating the catalyst accommodated in the decomposition means.
According to this configuration, the denaturation and / or decomposition of the organic contaminant that proceeds in the decomposition means is accelerated, and the cleaning water can be purified in a shorter time.

Moreover, the washing machine of this invention has an oxidizing agent removal means which removes the oxidizing agent contained in a treated water in the flow path of the treated water between a decomposition means and a water supply port.
According to this configuration, the unreacted oxidant is removed from the treated water reused in the rinsing process, and damage and discoloration of clothing stored in the washing tub are prevented.

In the washing machine of the present invention, the washing water channel between the drain port and the decomposition unit or the treatment water channel between the decomposition unit and the water supply port is filled with an adsorbent, and the washing water or It further has adsorption means for filtering the treated water.
According to this configuration, when the cleaning water used in the washing process is purified to treated water having a water quality that can be used in the rinsing process, at least a part of the organic contaminants contained in the washing water or the treated water is adsorbing means. Therefore, the purification can be completed in a short time and the quality of the treated water can be further improved. In addition, since the consumption of the oxidant is reduced, it is possible to reduce the energy required to generate the oxidant and reduce the load on the catalyst. Further, in the case of adopting a structure having an adsorption means in the treated water flow path between the decomposition means and the water supply port, unreacted hypohalous acid contained in the wash water discharged from the decomposition means It can be removed by the adsorbing means.

Furthermore, the washing machine of the present invention further includes an adsorbent regeneration means for discharging the contaminant adsorbed from the washing water by the adsorbent from the adsorbent.
According to this configuration, it is easy to regenerate the adsorbent on which the organic contaminants are adsorbed, and the cleaning water purification effect can be obtained over a long period of time without exchanging the adsorbent.

Furthermore, the washing machine of the present invention has pressure holding means for sealing the adsorbing means, and the adsorbent regeneration means seals the adsorbing means with the pressure holding means in a state where the adsorbent is in contact with water, After heating to 100 ° C. or more and 250 ° C. or less, the pressure holding means is opened, and the mixture of contaminants and water discharged from the adsorbent is discharged from the adsorption means.
According to this configuration, the organic contaminants adsorbed on the adsorbent can be efficiently desorbed, and the life of the adsorbent can be further prolonged.

Furthermore, in the washing machine of the present invention, the adsorbing means is installed in the washing water flow path between the drain outlet and the decomposing means, and the washing water flow path between the drain outlet and the adsorbing means, or the decomposing means and the washing means. It has a storage tank in the treated water flow path between the treated water discharge port to the outside of the machine, and the decomposition means generates a mixture of contaminants and water discharged from the adsorption means in the catalyst and the system. After making it contact with the made oxidizing agent and making it processing wastewater, the processing wastewater is discharged | emitted outside the washing machine with the water stored in the water storage tank.
According to this configuration, the amount of source water used is reduced by purifying the water used in the washing process to a water quality that can be used in the rinsing process and reusing it, and is discharged outside the washing machine after washing. By reducing the amount of organic pollutants and reducing the load on the wastewater treatment facility, it becomes possible to control the environmental load and drain the water outside the washing machine.

  According to the washing machine of the present invention, the washing water used in the washing process is reused as treated water purified to a water quality that can withstand use in the rinsing process, thereby rinsing process without using new source water. The amount of source water used can be reduced. Furthermore, according to the washing machine of the present invention, the effect of removing the surfactant from the garment in the rinsing process can be improved by the modification of the surfactant.

In the washing machine of the present invention, the cleaning water containing organic contaminants used in the washing process is purified to a water quality that can withstand use in the rinsing process by modifying and / or decomposing the organic contaminants. By reusing this treated water as water in the rinsing step, the amount of source water used is reduced.
An oxidation reaction by the action of a catalyst and an oxidizing agent is used as a method for modifying and / or decomposing organic contaminants. By activating the oxidizing agent with the catalyst, the denaturation and / or decomposition reaction of organic contaminants is accelerated, and the final reaction rate is also improved. As a reaction mechanism, an oxidant activated by a catalyst oxidatively cleaves a carbon-carbon bond or a carbon-hydrogen bond contained in an organic compound to generate a hydrophilic carboxyl group, hydroxyl group, or the like. It is considered that the organic compound is finally completely decomposed into carbon dioxide, water and the like through the modification process.

  Examples of organic contaminants in washing water include detergents derived surfactants, anti-resorption agents and enzymes, fatty acids and glycerides derived from sebum, proteins derived from the epidermis, urea and amino acids derived from sweat, Of these, 80% is occupied by the surfactant which is the main component of the detergent. Surfactants used in laundry detergents include anionic surfactants such as fatty acid salts, linear alkylbenzene sulfonate (LAS), α-olefin sulfonate (AOS), polyoxyethylene alkyl ether (AE). ) And the like. Therefore, as the catalyst for modifying and / or decomposing organic contaminants, among organic contaminants, those having the ability to modify and / or decompose surfactants are particularly preferable. In this case, the oxidative modification of the hydrophobic group in the surfactant by using an oxidizing agent and a catalyst reduces the hydrophobicity of the surfactant, thereby reducing the adsorptive power to clothing, and the rinsing effect of reused treated water Is expected to improve.

  In the washing machine of the present invention, as active components of the catalyst used for oxidative modification and / or oxidative decomposition of organic contaminants, manganese, iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium, platinum, copper , Gold and tungsten, and compounds of these metals. These metals and their compounds may be used alone or in combination of two or more. Among these catalytically active components, use of ruthenium having a high ability to oxidize organic substances and compounds thereof is particularly preferable.

These catalytically active components are used in a state of being supported on a known catalyst carrier according to a conventional method. Supports include metal oxides such as alumina, silica, zirconia and titania, composite metal oxides containing these metal oxides (alumina-silica, alumina-silica-zirconia, titania-zirconia, etc.), these metal oxides or Examples thereof include metal oxide-based carriers mainly composed of complex metal oxides and metal carriers such as iron and aluminum.
The shape of the carrier is not particularly limited as long as it can secure sufficient contact efficiency with the washing water to be treated. For example, a carrier such as a sphere, a pellet, a column, a crushed piece, a powder, and a honeycomb can be used.

  In the washing machine of the present invention, the oxidizing agent that denatures and / or decomposes organic contaminants is directly generated in the washing water introduced into the decomposition means containing the catalyst. By generating the oxidizing agent in the vicinity of the catalyst that contributes to its activation and the organic contaminants to be oxidatively decomposed, the active species with high oxidizing power activated by the catalyst are deactivated by various side reactions. Without contact, the organic contaminant can be contacted and the oxidation reaction of the organic contaminant can be advanced with high efficiency. In addition, since active species having strong oxidizing power are directly generated in the liquid phase, high temperature heating is not required as in the gas phase oxidation reaction using oxygen in the air.

  Examples of the oxidizing agent to be generated include ozone, hydrogen peroxide, oxygen, halous acid, hypohalous acid, hypohalous acid ion, chlorine, and chlorine dioxide. Examples of the halogen acid include chlorous acid, bromine acid, and iodic acid, and examples of the hypohalous acid include hypochlorous acid, hypobromous acid, and hypoiodous acid. In view of the strong oxidizing power, chlorous acid, bromous acid, hypochlorous acid, and hypobromous acid are preferable. Moreover, the said oxidizing agent may be produced | generated independently and may produce | generate two or more types.

  As a method of generating the oxidant in the decomposition means, there are two methods of generating ozone by carrying out discharge or light irradiation to bubbles containing oxygen generated in washing water, and generating oxidant by mixing. Examples thereof include a method of introducing the above chemicals into washing water, electrolysis, or a combination of these methods. An example of a method of adding two or more kinds of chemicals into washing water includes generation of chlorine dioxide by mixing chlorite and hydrochloric acid, or chlorate and hydrogen peroxide, etc. Is not to be done. The generation of the oxidizing agent by electrolysis will be described later.

In the washing machine of the present invention, the material constituting the decomposing means for containing the catalyst in the interior and generating the oxidant to denature and / or decompose the organic contaminants in the wash water is the oxidant produced inside If it has durability with respect to it, it will not specifically limit. For example, a resin such as polyethylene, polypropylene, or vinyl chloride resin, a highly corrosion-resistant metal such as stainless steel or titanium, or a metal whose inner wall is lined with a corrosion-resistant material such as glass, rubber, or Teflon can be used. A polyethylene pipe, a hard polyvinyl chloride pipe, etc. can be used for piping.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1
FIG. 1 is a schematic sectional view of a washing machine according to Embodiment 1 of the present invention.
The washing machine shown in FIG. 1 includes a washing tub 1, a drain outlet 2, a pump 3, a disassembling means 6 having a catalyst holding means 5 inside and containing a catalyst 4, an anode 8 and a cathode 9, and a power supply unit 10. It is comprised from the agent production | generation means 7, the electrolyte supply means 11, the oxidizing agent removal means 12, the switching valve 13, the water supply port 14, the discharge port 15 to the washing machine exterior, and piping which connects these. The switching valve 13 has a function of switching the flow path of the treated water discharged from the oxidant removing means 12 to the washing tub 1 and the discharge port 15 to the outside of the washing machine.
The oxidant generating means 7 in the present embodiment has an anode 8 and a cathode 9 which are installed in the decomposition means 6 and at least part of which is in contact with the cleaning water, and a power supply unit 10. Electric power is supplied through 8 and the cathode 9, and the cleaning water in the decomposition means 6 is electrolyzed to generate an oxidant.

When electrolysis is performed on water containing an electrolyte, various electron transfer reactions occur in the vicinity of the electrodes, and various active species are generated accordingly. For example, when halide ions are present as the electrolyte, the following reaction proceeds in the vicinity of the anode, and halogen gas and hypohalous acid as oxidizing agents are generated (Formula 1).
2X ⁻ → X ₂ ↑ + 2e ⁻ (X = Cl, Br, I)
X ₂ + H ₂ O → HX + HXO Formula 1
Moreover, hydrogen peroxide is generated in the vicinity of the cathode by using a gas diffusion electrode or the like carrying a catalyst as the cathode (Formula 2).
O ₂ + H ₂ O + 2e ⁻ → HO ₂ ⁻ + OH ⁻ Formula 2
Furthermore, it is considered that active species having strong oxidizing power such as oxygen radicals and hydroxyl radicals are generated in the vicinity of the electrode during electrolysis.

  Most of the oxidizers mentioned above belong to the first class of dangerous goods, and require a license for the handling of dangerous goods in handling and storage. There are also substances that are harmful to the human body, such as ozone. In the washing machine of the present invention, since these oxidizing agents are not added as chemicals and are directly generated in the washing water during the process of decomposing organic contaminants, it is not necessary to handle and store dangerous chemicals. . In addition, the oxidant generating means 7 in the present embodiment is composed of at least a pair of an anode 8 and a cathode, a power supply section, and the like, and is easy to manage because it only electrolyzes water containing an electrolyte such as a halogen salt. is there. Therefore, it can be easily applied in general homes where it is difficult to manage medicines. Further, since a tank for holding the oxidant is not required, the apparatus can be miniaturized. Furthermore, it is considered that active species that are unstable but have strong oxidizing power, such as radicals, can also contribute to the oxidative decomposition reaction of organic contaminants, and the purification of the washing water proceeds more effectively.

Note that, as shown in the above reaction formula, it is considered that the amount of oxidant produced in electrolysis has a correlation with the amount of current applied. For this reason, if the correlation between the amount of current and the amount of oxidant produced is determined in advance, the amount of oxidant produced can be adjusted by adjusting the electrolysis conditions such as electrolysis time and voltage even when the concentration of the electrolyte contained in the wash water is different. It is possible to easily perform the control.
Examples of the method for performing electrolysis include a method of applying a DC voltage to the anode and the cathode brought into contact with the washing water. The electrolysis conditions are, for example, a voltage of 5 to 50 V and a current of 0.5 to 600 A / m ² per electrode surface area. Note that when the current density is higher than 600 A / m ² , the surface of the anode is peeled off or eluted. When the current density is lower than 0.5 A / m ² , the area of the anode tends to be large, and it is difficult to reduce the size.

  As the material of the anode 8 and the cathode 9, a material usually used for an electrolysis reaction, for example, a material having ruthenium, iridium, platinum, palladium, rhodium, tin, or an oxide or ferrite thereof on the surface is used. Is preferred. For example, the anode 8 and the cathode 9 themselves may be composed of these materials. Or the surface of the base material of the anode 8 and the cathode 9 may be coat | covered with these substances. Ruthenium, iridium, platinum, palladium, rhodium and tin may be metal elements themselves or oxides. Moreover, alloys of these metals are also preferably used. Examples of the alloy include platinum-iridium, ruthenium-tin, and ruthenium-titanium.

  The metals described above are excellent in corrosion resistance, and are preferable because they exhibit excellent insolubility when used as an anode. In particular, as the anode for generating halogen gas, insolubility, safety of electrolyzed water, and the like are further required, and therefore, an anode containing palladium, ruthenium, an alloy of platinum and iridium as a main component is particularly preferable. Since the material used for the cathode is not particularly required to be strictly insoluble, for example, a nickel alloy such as stainless steel, carbon steel, titanium, a titanium alloy, Hastelloy, or Inconel can also be used.

  In carrying out the electrolysis, the washing water contains ions derived from a surfactant such as sodium ions and chloride ions derived from sweat as an electrolyte. When the oxidant is generated by electrolysis in the washing water stored in the decomposition means 6, the washing water may be electrolyzed as it is, but the concentration of such electrolyte in the washing water is not high, and the washing machine is used. Obtain a sufficient amount of current to produce an oxidizer within a practical time (considered tens of hours to several hours for rinsing water purification, and several hours to one day for cleaning effluent water). Often not. Therefore, in the washing machine of the present invention, in order to increase the electrolysis current and increase the generation rate of the oxidizing agent, and to replenish consumed ions by being released into the gas phase as a gas during electrolysis, the electrolysis current is maintained. Therefore, it is preferable to have the electrolyte supply means 11 for introducing the electrolyte into the washing water stored in the decomposition means 6.

  Examples of the electrolyte to be added to the washing water include acids represented by hydrochloric acid, sulfuric acid, acetic acid, etc., alkalis represented by sodium hydroxide, potassium hydroxide, slaked lime, halogen salts, sulfates, carbonates, ammonium salts, Various compounds that dissolve in water and generate ions, such as metal salts typified by sulfonates, can be used. Considering that washing machines are widely used in general households, it is more safe to use halogen salts, especially sodium chloride or potassium chloride as electrolytes, which are safe and inexpensive, easily available in the home, and have a high degree of dissociation into ions. preferable. By introducing a halogen salt as an electrolyte and carrying out electrolysis, hypohalous acid, which is an oxidizing agent, can be produced in a sufficient amount for oxidative decomposition of organic contaminants in the wash water.

  The method for supplying the electrolyte to the wash water is preferably introduced as an aqueous solution from the viewpoint of ensuring the uniformity of the halogen salt concentration in the wash water, but is not limited thereto. This electrolyte supply is preferably carried out at least once before the start of electrolysis. Further, an electrolyte may be added as appropriate during the electrolysis of the wash water. The material constituting the electrolyte supply means 11 is not particularly limited as long as it has durability to halide ions. For example, resins such as polyethylene, polypropylene, and vinyl chloride resin can be used.

  In order to realize efficient activation of the hypohalous acid generated from the anode by electrolysis, it is necessary to improve the contact efficiency between the generated hypohalous acid and the catalyst. Hypohalous acid is generated when the halogen gas generated from the surface of the anode and floating on the water surface is dissolved in the washing water, so that the generation probability is considered to be higher above the anode. For this reason, it is preferable for raising the contact efficiency that at least a part of the catalyst is located above the lower end of the anode during the electrolysis. As a method of positioning the catalyst above the lower end of the anode, the catalyst is formed of a material having durability to hypohalous acid, has a structure that allows water to pass through, and at least a part of the catalyst is lower than the lower end of the anode. Examples include, but are not limited to, use of the catalyst holding means 5 that holds the upper portion, stirring, and flow of the catalyst by using water flow such as upward / downward flow.

  In the present embodiment, when the treated water discharged from the decomposition means 6 is returned to the washing tub 1, if unreacted oxidant remains in the washing water, the fibers constituting the clothing are caused by the oxidizing power. Since there is a risk of deterioration or color and pattern being bleached and damaged, it is preferable to install the oxidant removing means 12 in the flow path of the treated water between the decomposition means 6 and the water supply port 14. The oxidizing agent removing unit 12 is not particularly limited as long as it can remove the unreacted oxidizing agent from the treated water after the oxidizing agent is generated in the decomposition unit 6. For example, a reducing agent such as sodium thiosulfate that reduces and decomposes the oxidizing agent, activated carbon, a catalyst that decomposes the oxidizing agent such as manganese dioxide and nickel oxide, and an aeration means that volatilizes the oxidizing agent can be considered.

  The operation mechanism of the washing machine shown in FIG. 1 is shown below. First, a washing process of clothes is performed in the washing tub 1 with washing water containing a detergent. After completion of the washing process, the washing water containing the detergent is discharged from the drain port 2 to the disassembling means 6 containing the catalyst 4 by the action of the pump 3. Subsequently, after supplying an electrolyte to the washing water from the electrolyte supply means 11, the oxidant generation means 7 applies a voltage from the power supply unit 10 through the anode 8 and the cathode 9 to perform electrolysis, and the anode 8 and The oxidizing agent produced from the vicinity of the cathode 9 is brought into contact with the catalyst 4 and the washing water, and the organic contaminants contained in the washing water are modified and / or decomposed to obtain treated water.

  When the electrolysis is performed, after the oxidant is generated in the washing water by electrolysis, the process of temporarily stopping the electrolysis for a predetermined time may be repeated to divide the voltage application twice or more. About the said process, besides implementing a repeating process for predetermined time, it can also be determined whether a repeating process is continued by detecting the unreacted oxidizing agent which remains in washing water after electrolysis stop. The remaining oxidant in the wash water can be detected by, for example, an oxidation-reduction potential (ORP) meter. The oxidation-reduction potential of the washing water increases when an oxidizing agent is present, and decreases when the oxidizing agent is completely consumed due to an oxidation reaction of organic contaminants. Therefore, it can be considered that all organic contaminants in the washing water are oxidized and decomposed at the stage where the redox potential of the washing water does not decrease even after the electrolysis is stopped.

For example, when a halogen salt is used as an electrolyte, hypohalous acid generated by electrolysis is activated by a catalyst to oxidize organic contaminants, and is finally reduced to halide ions (formula 3). . The halide ions generated in Equation 3 are regenerated to hypohalous acid by being oxidized again at the anode.
(2a + b / 2 - c ) HXO + C a H b O c N d
_{→ aCO 2 + b / 2H 2} O + d / 2N 2 + HX ··· Formula 3
(C _a H _b O _c N _d : General formula of organic contaminants)

After performing electrolysis on the wash water to produce hypohalous acid, the process of once stopping the electrolysis and consuming all the generated hypohalous acid to reduce it to halide ions is required as many times as necessary. By repeating only this, the oxidant necessary for the oxidation reaction of the organic pollutant is efficiently generated, and it becomes possible to avoid excessive power consumption.
The treated water obtained by the purification process is returned to the washing tub 1 via the switching valve 13 switched to the washing tub 1 side after removing the unreacted oxidant by the oxidant removing means 12. Reused in the rinsing process of clothing. This circulation of the wash water may be repeated as appropriate during the rinsing step.

After completion of the rinsing process, the switching valve 13 is switched to the discharge port 15 side to the outside of the washing machine, and the washing water is discharged to the outside of the washing machine via the decomposition means 6 and the oxidant removal means 12. At this time, electrolysis is again performed on the washing water, and organic contaminants contained in the discharged washing water may be modified and / or decomposed.
If the water quality of the cleaning water after purification does not reach the level that can be used in the rinsing process, after the cleaning water is discharged to the outside of the washing machine, the source water is newly added and an additional rinsing process is performed. You may implement. Also in this case, it is possible to obtain a rinsing effect with a small amount of rinsing water by purifying the rinsing water by the decomposition means 6 and returning it to the washing tub 1. In this case, the “level that can withstand use in the rinsing process” is the concentration of organic substances contained in the cleaning water after purification (which may be considered as an indicator of the concentration of surfactants and organic contaminants in the detergent) It refers to about 5% of the concentration in the wash water. The same applies to the following embodiments.

  According to this configuration, the source water used in the subsequent rinsing step can be reduced by removing organic contaminants in the washing water during the washing step. Alternatively, the rinsing process can be carried out without using new source water by reusing the cleaning water used in the washing process as treated water purified to a water quality that can withstand use in the rinsing process. Can be further reduced. Further, in the rinsing step, the surfactant concentration contained in the washing water reused in the rinsing step is further reduced and / or the adsorptivity to clothing is reduced due to the modification of the surfactant. The effect of removing the surfactant from the clothes is improved.

Further, according to this configuration, the oxidizing agent is directly generated in the cleaning water containing organic contaminants by electrolysis of the cleaning water, so that it is not necessary to hold a dangerous chemical as the oxidizing agent, and the management of the oxidizing agent generating means 7 is performed. This makes it easy to use even in ordinary households where management of chemical substances is difficult.
In the present embodiment, the inside of the decomposition means 6 is not divided into an anode chamber and a cathode chamber by a diaphragm, but the decomposition means 6 may have a diaphragm and the inside may be partitioned.

  Further, in the present embodiment, the catalyst holding means 5 is provided inside the decomposition means 6 so that at least a part of the catalyst 4 is installed above the lower end of the anode. However, the catalyst holding means 5 is not provided. Alternatively, the catalyst 4 may be positioned above the lower end of the anode by utilizing the flow of the catalyst by using a water flow such as stirring or upward / downward flow. This also applies to the following embodiments.

Embodiment 2
FIG. 2 is a schematic cross-sectional view of a washing machine according to Embodiment 2 of the present invention. In FIG. 2, the same components as those in FIG.
In addition to the washing machine shown in FIG. 1, the washing machine shown in FIG. 2 further includes a decomposition system heating means 16, a decomposition system heating control means 17, and a diaphragm 18 in the decomposition means 6. The switching valve 13 has a function of switching the flow path of the treated water discharged from the oxidant removing means 12 to the washing tub 1 and the discharge port 15 to the outside of the washing machine.
In the present embodiment, the disassembling means 6 has a diaphragm 18, and the inside thereof is partitioned into an anode chamber and a cathode chamber by the diaphragm 18. Ceramic, resin, glass fiber, etc. can be used for the diaphragm 18. For example, it is possible to use a non-woven fabric made of polyester or glass fiber and made hydrophilic by attaching a resin film having a pore diameter of 0.2 to 200 μm.

When electrolysis of washing water using a halogen salt as an electrolyte, the anode 8 and the cathode 9 are partitioned by a diaphragm 18 so that the anode chamber on the anode 8 side contains an acid containing hypohalous acid. Alkaline water is generated in the cathode chamber on the cathode 9 side. Hypohalous acid can take two states, hypohalous acid and hypohalous ion, depending on pH (Equation 4), but hypohalous acid at low pH has stronger oxidizing power.
HXO ⇔ H ^{+ +} XO ^- ··· formula 4

Therefore, by partitioning between the anode 8 and the cathode 9 and generating acidic water in the anode chamber, the oxidizing power of hypohalous acid generated in the washing water is strengthened, and the oxidation reaction of organic pollutants is more effective. It is possible to proceed to. In this case, hypohalous acid, which is an oxidizing agent, is generated only in the anode chamber, so that the utilization efficiency of the catalyst is improved by storing the catalyst only in the anode chamber side. Therefore, efficient activation of hypohalous acid can be realized, and the modification and / or decomposition reaction due to oxidation of organic contaminants can be efficiently advanced.
In addition, you may take the structure which adds some alkaline water produced | generated in the cathode chamber to an anode chamber.

On the other hand, the decomposition system heating means 16 is not particularly limited as long as it can heat the catalyst 4 accommodated in the decomposition means 6. For example, an electric heating means using Joule heat, a combustion means using combustion heat of gas or petroleum, a heat pump, an induction heating means, etc. can be considered. When contact heating such as electric heating is adopted, it is installed on the inner wall of the suction means 20 or the decomposition means 6, or the piping is coiled like a throwing heater to directly contact the contents of the suction means 20 or the decomposition means 6. It is preferable to increase the heating efficiency.
The cracking system heating control means 17 measures the temperature of the catalyst 4 accommodated in the cracking means 6 and controls the operation of the cracking system heating means 16 based on the measured temperature data. The configuration of the decomposition system heating control means 17 is not particularly limited, but a combination of a temperature sensor using a thermocouple, a resistance temperature detector, a thermistor, etc., and a microcomputer, a personal computer, an IC memory, etc., to which a control program is input. Can be realized.

  The operation mechanism of the washing machine shown in FIG. 2 when hypohalous acid is generated as an oxidizing agent is shown below. The process up to the discharge of the washing water to the decomposition means 6 is the same as in the first embodiment. Subsequently, after adding a halogen salt to the washing water from the electrolyte supply means 11, the oxidant generation means 7 applies voltage from the power supply section 10 through the anode 8 and the cathode 9 to perform electrolysis, and in the vicinity of the anode The hypohalous acid produced is brought into contact with the catalyst 4 and the washing water, and the organic contaminants contained in the washing water are modified and / or decomposed to obtain treated water. At this time, the catalyst 4 is heated by the decomposition system heating means 16. The heating temperature of the catalyst 4 is set to a temperature at which the oxidative modification and / or oxidative decomposition of organic contaminants contained in the system is sufficiently accelerated. In particular, in the washing machine of the present invention, the heating temperature of the catalyst 4 accommodated in the disassembling means 6 is desirably 100 ° C. or less. Above 100 ° C., equipment such as a pressure vessel corresponding to the pressure increase accompanying the evaporation of moisture in the decomposition means 6 is required, which is not preferable from the viewpoint of cost and installability.

The treated water obtained by the purification process is returned to the washing tub 1 through the switching valve 13 switched to the washing tub 1 side after removing unreacted hypohalous acid by the oxidant removing means 12. And reused in the garment rinsing process. This circulation of the wash water may be repeated as appropriate during the rinsing step. The subsequent steps are the same as those in the first embodiment.
According to this configuration, the inside of the decomposition means 6 is partitioned into an anode chamber and a cathode chamber using the diaphragm 18, so that hypohalous acid, which is an oxidizing agent, on the anode chamber side is in an acid state having a stronger oxidizing power. It becomes possible to generate the organic pollutant, and the oxidation reaction of the organic contaminant proceeds efficiently. Further, the oxidative decomposition reaction can be further accelerated by heating the cleaning water by the decomposition system heating means 16. Further, as a secondary effect, as a result of the cleaning water being heated by the decomposition system heating means 16, it can be expected that the rinsing effect of the cleaning water is further enhanced.

Embodiment 3
FIG. 3 is a schematic sectional view of a washing machine according to Embodiment 3 of the present invention. 3, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.
The washing machine shown in FIG. 3 stores a washing tub 1, a drain port 2, a pump 3, an adsorbing means 20 filled with an adsorbent 19, an adsorbent regeneration means 21 for heating the adsorbent 19, a pressure holding means 22, and a catalyst 4. The decomposition means 6, the decomposition system heating means 16, the decomposition system heating control means 17, the oxidant generation means 7 comprising the anode 8 and the cathode 9 and the power supply unit 10, the electrolyte supply means 11, the oxidant removal means 12, and the switching valve 13. , A water supply port 14, a discharge port 15 to the outside of the washing machine, and a pipe connecting them. The switching valve 13 has a function of switching the flow path of the washing water discharged from the disassembling means 6 to the washing tub 1 and the discharge port 15 to the outside of the washing machine.

  In the present embodiment, the adsorbing means 20 filled with the adsorbent 19 is provided in the flow path of the washing water between the drain port 2 and the decomposition means 6. By this adsorption means 20, a part of the organic contaminants contained in the washing water before being put into the decomposition means 6 is adsorbed and removed in advance. As a result, the amount of organic contaminants that are denatured and / or decomposed by the decomposing means 6 can be reduced, the cleaning water purification process can be carried out in a short time, and the organic contaminants contained in the treated water can be reduced. The amount of the treated water that is reused in the rinsing process is also reduced and the quality of the treated water is improved. Furthermore, since the amount of consumption of the oxidant is reduced, consumption of energy (in the case of generation by electrolysis) required for oxidant generation is reduced, which contributes to a reduction in running cost.

The adsorbent 19 only needs to adsorb organic contaminants contained in the washing water discharged from the washing tub 1 or the decomposition means 6. For example, a porous compound such as activated carbon, silica, alumina, zeolite, clay, titanium oxide can be used.
The adsorbent regeneration means 21 is a means for discharging organic contaminants adsorbed on the adsorbent 19 from the adsorbent 19. Specifically, desorption or thermal decomposition of organic contaminants by heating the adsorbent 19, desorption of organic contaminants by introducing new source water or a solvent capable of dispersing organic contaminants, desorption of organic contaminants by ultrasonic vibration, etc. Can be considered. In particular, in the present invention, organic contaminants are discharged from the adsorbent 19 by utilizing desorption of the organic contaminant from the adsorbent 19 by heating the adsorbent 19 in contact with water. ing.

  The heating means for the adsorbent 19 is not particularly limited as long as it can heat the adsorbent 19 filled in the adsorbing means 20. For example, as with the decomposition system heating means 16, an electric heating means using Joule heat, a combustion means using combustion heat such as gas or petroleum, a heat pump, an induction heating means, etc. can be considered. Also in the adsorbent regeneration means 21 for heating the adsorbent 19, when contact heating such as electric heating is adopted, the adsorbing means 20 is installed on the inner wall of the adsorbing means 20 or the pipe is coiled like a throwing heater. It is preferable to increase the heating efficiency by directly contacting the contents. Further, it is more preferable to increase the heating efficiency by using a heat insulating material such as glass wool or rock wool to suppress heat radiation to the surroundings. The waste heat generated by the adsorbent regenerating means 21 or the washing water discharged from the adsorbing means 20 after being heated by the adsorbent regenerating means 21 is used for heating the decomposition means 6 instead of the decomposition system heating means 16. It is also conceivable that the adsorbent regeneration means 21 also serves as the decomposition system heating means 16.

  The heating temperature of the adsorbent 19 is set to a temperature at which the adsorbed organic contaminant is sufficiently desorbed. In particular, in the washing machine of the present invention, the heating temperature is preferably set in the range of 100 ° C. to 250 ° C., particularly over 100 ° C. Below 100 ° C, desorption of organic contaminants from the adsorbent 19 is insufficient, and when it exceeds 250 ° C, polymerization of organic contaminants and components of organic contaminants begins to occur, and tar and other polymers are likely to be generated. This is because tar-like deposits increase on the inner wall of the adsorbing means 20 and the adsorbent 19 and the maintainability deteriorates. In particular, when activated carbon is used as the adsorbent 19, a weight loss associated with oxidative decomposition may be observed at a high temperature of 250 ° C. or higher, which is not preferable. In this case, the material constituting the adsorption means is not particularly limited as long as it has sufficient durability against the heating temperature, and it is possible to use metals such as iron, copper, aluminum, and stainless steel, ceramics, and the like. it can.

  When the heating temperature of the adsorbent 19 exceeds 100 ° C., it is preferable to install the pressure holding means 22 in the adsorption means 20 in order to prevent evaporation of water held in the adsorption means 20 by heating. The pressure holding means 22 only needs to be able to form a closed space so that water vapor, gas, and the like due to heating do not escape to the atmosphere while the adsorbent 19 is heated. For example, it is realized by installing a valve for sealing the inlet for supplying cleaning water and the outlet for discharging the cleaning water after heating in the adsorbing means 20, and closing the valve at least during heating. Of course, the internal pressure rises during heating, but it has pressure resistance so that the inlet and outlet can be kept closed even under that pressure. However, it is preferable to arrange a pressure release valve that releases internal steam when the internal pressure rises too much due to abnormal internal gas generation. Of course, this pressure release valve is set to a value smaller than the strength of the adsorbing means 20, for example, 0.5 to 15 MPa or less. It is sufficient that this discharge port is provided with a mechanism capable of discharging the water in the adsorbing means 20 to the outside and controlling opening and closing that can withstand the pressure during heating.

  The operation mechanism of the washing machine shown in FIG. 3 is shown below. First, a washing process of clothes is performed in the washing tub 1 with washing water containing a detergent. After completion of the washing process, the washing water containing the detergent is transferred to the adsorption means 20 by the action of the pump 3. The washing water from which the organic contaminants have been adsorbed and removed by the adsorbent 19 filled in the adsorbing means 20 is subsequently transferred to the decomposing means 6. Subsequently, after supplying an electrolyte to the washing water from the electrolyte supply means 11, the oxidant generation means 7 applies a voltage from the power supply unit 10 through the anode 8 and the cathode 9 to perform electrolysis, and the anode 8 and The oxidizing agent produced from the vicinity of the cathode 9 is brought into contact with the catalyst 4 and the washing water, and the organic contaminants contained in the washing water are modified and / or decomposed to obtain treated water. The treated water obtained is removed by the oxidant removing means 12 to remove the unreacted oxidant, and then returned to the washing tub 1 via the switching valve 13 switched to the washing tub 1 side for the rinsing process of clothing. Reused. This circulation of the wash water may be repeated as appropriate during the rinsing step.

  After completion of the rinsing process, the switching valve 13 is switched to the discharge port 15 side to the outside of the washing machine, and the washing water is discharged to the outside of the washing machine via the adsorption means 20, the decomposition means 6 and the oxidant removal means 12. At this time, the pressure holding means 22 is closed with a part of the washing water left in the adsorbing means 20, and the discharge of the washing water is stopped. Subsequently, the adsorbent 19 is heated by the adsorbent regeneration means 21, and the adsorbent 19 is regenerated by desorbing the adsorbed organic contaminants to the washing water remaining in the adsorption means 20. In this configuration, the heating time of the adsorbent 19 is preferably maintained for about 2 minutes to 2 hours after reaching the heating temperature. When the retention time is less than 2 minutes, the desorption of the organic contaminants from the adsorbent 19 is insufficient. On the other hand, when the retention time exceeds 2 hours, the adsorption / desorption reaction between the adsorbent 19 and the organic contaminants reaches an equilibrium. The progress of desorption cannot be expected.

After the heating is completed, the adsorbent 19 is cooled to 100 ° C. or lower, the pressure holding means 22 is opened, and the cleaning water containing the organic contaminants is discharged to the decomposition means 6, the oxidant removing means 12 and the outlet to the outside of the washing machine. It discharges outside the washing machine via the switching valve 13 switched to the 15 side.
According to this configuration, when the washing water used in the washing process is purified into treated water having a water quality that can be used in the rinsing process, at least a part of the organic contaminants contained in the washing water is removed by the adsorption means 20. Therefore, purification can be completed in a short time and the quality of the treated water can be further improved. Further, it is possible to reduce the consumption of the oxidizer and reduce the load on the catalyst 4.
In the present embodiment, a method for desorbing organic contaminants from the adsorbent 19 using a part of the washing water has been presented. The source water may be newly supplied to the adsorbing means 20 via the desorption process.
In the present embodiment, the inside of the decomposition means 6 is not divided into an anode chamber and a cathode chamber by a diaphragm, but the decomposition means 6 may have a diaphragm and the inside may be partitioned.

Embodiment 4
FIG. 4 is a schematic sectional view of a washing machine according to Embodiment 4 of the present invention. 4, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof is omitted.
The washing machine shown in FIG. 4 includes a washing tub 1, a drain port 2, a pump 3, a decomposition means 6 containing a catalyst 4, a decomposition system heating means 16, a decomposition system heating control means 17, an anode 8 and a cathode 9, and a power supply unit. 10 oxidant generating means 7, electrolyte supply means 11, adsorption means 20 filled with adsorbent 19, adsorbent regeneration means 21 for heating the adsorbent 19, pressure holding means 22, switching valve 13, water supply port 14, laundry It is comprised from the discharge port 15 to the exterior of a machine, and the piping which connects these. The switching valve 13 has a function of switching the flow path of the washing water discharged from the adsorbing means 20 to the washing tub 1 and the discharge port 15 to the outside of the washing machine.

  In the present embodiment, the adsorbing means 20 filled with the adsorbent 19 is provided in the flow path of the treated water between the decomposition means 6 and the water supply port 14. By this adsorption means 20, a part of the organic contaminants discharged from the decomposition means 6 and remaining in the treated water before being returned to the washing tub 1 is adsorbed and removed. As a result, the quality of the treated water reused in the rinsing process is improved. Further, when activated carbon is used as the adsorbent 19, since the activated carbon has a reducing action, it is possible to decompose and remove unreacted oxidant remaining in the treated water. As a result, the oxidant removing means 12 can be downsized or omitted.

  The operation mechanism of the washing machine shown in FIG. 4 is shown below. First, a washing process of clothes is performed in the washing tub 1 with washing water containing a detergent. After completion of the washing process, the washing water containing the detergent is transferred to the decomposition means 6 by the action of the pump 3. Subsequently, after supplying an electrolyte to the washing water from the electrolyte supply means 11, the oxidant generation means 7 applies a voltage from the power supply unit 10 through the anode 8 and the cathode 9 to perform electrolysis, and the anode 8 and The oxidizing agent produced from the vicinity of the cathode 9 is brought into contact with the catalyst 4 and the washing water, and the organic contaminants contained in the washing water are modified and / or decomposed to obtain treated water. At this time, the catalyst 4 accommodated in the decomposition unit 6 may be appropriately heated by the decomposition system heating unit 16.

Subsequently, treated water in which at least a part of organic contaminants has been denatured and / or decomposed by the action of the catalyst 4 and the oxidizing agent is discharged from the decomposition means 6 to the adsorption means 20. Organic contaminants that are at least partially denatured and / or decomposed contained in the treated water are adsorbed and removed by the adsorbent 19 accommodated in the adsorbing means 20. Thereafter, the treated water is returned to the washing tub 1 via the switching valve 13 and reused in the rinsing process.
The above series of steps may be repeated as appropriate during the rinsing step. And after completion | finish of a rinse process, the switching valve 13 is switched to the discharge port 15 side to the washing machine exterior, and wash water is discharged | emitted outside the washing machine via the decomposition | disassembly means 6 and the adsorption means 20. FIG. In addition, after completion of the rinsing process, as in the third embodiment, the step of regenerating the adsorbent 19 by desorbing the organic contaminants from the adsorbent 19 by the adsorbent regenerating means 21 is a long life of the adsorbent 19. It is preferable from the viewpoint of conversion.

According to this structure, since at least one part of the organic contaminant contained in treated water is removed by the adsorption | suction means 20, the water quality of treated water can be improved more. When activated carbon is used as the adsorbent 19 and hypohalous acid generated by electrolysis in the presence of a halogen salt is used as the oxidant, unreacted hypochlorous acid contained in the wash water discharged from the decomposition means 6 is used. The halogen acid can be removed by the adsorption means 20.
In the present embodiment, the decomposition heating means 16 is provided separately from the adsorbent regeneration means 21, but the washing water heated by the adsorbent regeneration means 21 is put into the decomposition means 6 without cooling. In addition, it is considered that an effect similar to that provided separately by the decomposition system heating means 16 can be obtained also by performing heat exchange with the decomposition means 6.
In the present embodiment, the inside of the decomposition means 6 is not divided into an anode chamber and a cathode chamber by a diaphragm, but the decomposition means 6 may have a diaphragm and the inside may be partitioned.

Embodiment 5
FIG. 5 is a schematic sectional view of a washing machine according to Embodiment 5 of the present invention. 5, the same components as those in FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof is omitted.
The washing machine shown in FIG. 5 stores a washing tub 1, a drain port 2, a pump 3, an adsorbing means 20 filled with an adsorbent 19, an adsorbent regeneration means 21 for heating the adsorbent 19, a pressure holding means 22, and a catalyst 4. The oxidant generating means 7, the electrolyte supply means 11, the oxidant removing means 12, the switching valve 13, the water supply port 14, the water tank 23, and the water tank valve comprising the decomposed means 6, the anode 8 and the cathode 9, and the power supply unit 10. 24, a discharge port 15 to the outside of the washing machine, and a pipe connecting them. The switching valve 13 has a function of switching the flow path of the washing water discharged from the disassembling means 6 to the washing tub 1 and the discharge port 15 to the outside of the washing machine.

  The water storage tank 23 stores at least a part of the cleaning water discharged from the washing tub 1 through the drain port 2 at the end of the rinsing process. The washing water discharged from the adsorbing means 20 after heating the adsorbent 19 by the adsorbent regenerating means 21 has organic contaminants concentrated to several to several tens of times the concentration in the washing process, and is directly taken out of the washing machine. When discharged, it places a heavy load on the wastewater treatment facility. Therefore, the cleaning water discharged from the adsorption means 20 is contacted with the catalyst 4 and the oxidant by the decomposition means 6 to denature and / or decompose at least a part of the organic contaminants, and then stored in the water storage tank 23. By diluting with washing water after completion of the rinsing process and discharging it to the outside of the washing machine, it is possible to achieve both reduction in the amount of source water used and reduction in the load on wastewater treatment. In addition, the material which comprises the water storage tank 23 will not be specifically limited if it has durability with respect to washing water. For example, a resin such as polyethylene, polypropylene, or vinyl chloride resin, a highly corrosion-resistant metal such as stainless steel or titanium, or a metal whose inner wall is lined with a corrosion-resistant material such as glass, rubber, or Teflon can be used.

  The operation mechanism of the washing machine shown in FIG. 5 is shown below. First, the washing water purification process by the adsorption means 20 and the decomposition means 6 from the clothes washing process is the same as in the third embodiment. After the rinsing process is completed, the switching valve 13 is switched to the discharge port 15 side to the outside of the washing machine, and a part of the washing water is adsorbed when the washing water is discharged to the outside of the washing machine via the adsorption means 20 and the decomposition means 6. The pressure holding means 22 and the water tank valve 24 are closed while remaining in the means 20 and the water tank 23. Subsequently, the adsorbent 19 is heated by the adsorbent regeneration means 21, and the adsorbent 19 is regenerated by desorbing the adsorbed organic contaminants to the washing water remaining in the adsorption means 20.

  After the heating, the adsorbing means 20 is cooled to 100 ° C. or lower, the pressure holding means 22 is opened, and the washing water containing organic contaminants is discharged to the decomposition means 6 containing the catalyst 4. Subsequently, after supplying an electrolyte to the washing water from the electrolyte supply means 11, the oxidant generation means 7 applies a voltage from the power supply unit 10 through the anode 8 and the cathode 9 to perform electrolysis, and the anode 8 and The oxidizing agent produced from the vicinity of the cathode 9 is brought into contact with the catalyst 4 and the washing water, and the organic contaminants contained in the washing water are modified and / or decomposed to obtain treated water. After the elapse of a predetermined time, the wash water after the rinsing process stored in the water storage tank 23 together with the treated water is discharged to the outside of the washing machine through the discharge port 15 to the outside of the washing machine.

According to this configuration, the amount of source water used is reduced by purifying the water used in the washing process to a water quality that can be used in the rinsing process and reusing it, and is discharged outside the washing machine after washing. By reducing the amount of organic pollutants and reducing the load on the wastewater treatment facility, it becomes possible to control the environmental load and drain the water outside the washing machine.
In the present embodiment, the water storage tank 23 is provided in the treated water flow path between the switching valve 13 and the discharge port 15 to the outside of the washing machine. However, the water storage tank 23 has the drain port 2 and the disassembling means. There is no particular problem as long as it is installed either in the flow path of cleaning water between 6 or the processing water flow path between the disassembling means 6 and the discharge port 15 to the outside of the washing machine.
Further, in the present embodiment, the decomposition system heating means 16 and the decomposition system heating control means 17 are not particularly provided, and the catalyst 4 is heated using the residual heat after heating by the adsorbent regeneration means 21, but the decomposition is performed. The system heating unit 16 and the decomposition system heating control unit 17 may be provided separately.

In the present embodiment, the inside of the decomposition means 6 is not divided into an anode chamber and a cathode chamber by a diaphragm. However, the decomposition means 6 may have a diaphragm and the inside is partitioned.
Further, in the present embodiment, the washing water stored in the water storage tank 23 after the rinsing process is configured to be drained to the outside of the washing machine through the discharge port 15 to the outside of the washing machine. Since the stored washing water is one from which organic contaminants have been sufficiently removed, a means for adding the washing water stored in the water storage tank 23 to the washing tub 1 may be further added. By adding a means for charging the washing water stored in the water storage tank 23 into the washing tub 1, the stored washing water can be reused as washing water in the next washing process or rinsing process. It is possible to further reduce the amount of use.
Hereinafter, the present invention will be described based on examples. The following examples are for explaining one embodiment of the present invention, and do not limit the present invention.

Example 1
The effect of reducing the amount of water used by the washing machine shown in FIG. 1 was verified. The verification method is as follows.
The decomposition means 6 was made of polyethylene and had an internal volume of 2 L, and contained therein 20 g of a titanium oxide-supported ruthenium catalyst (metal amount: 3%) as the catalyst 4. As the catalyst holding means 5, a stainless steel wire mesh (400 mesh) was used.
As for the oxidant generation means 7, a titanium plate whose surface was covered with platinum as the anode 8, a stainless plate as the cathode 9, and a DC power source as the power supply unit 10 were used. As the electrolyte supply means 11, a polyethylene container containing a sodium chloride aqueous solution (saturated concentration) was used.
Granular activated carbon was used as the oxidant removing means 12, and a resin three-way valve was used as the switching valve 13.
30 L of washing water containing 200 ppm of linear alkylbenzene sulfonate (hereinafter referred to as LAS) as a detergent component was passed through the decomposition means 6 at a flow rate of 4 L / min, and the decomposition step of returning to the washing tub 1 was continued for 10 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was introduced from the electrolyte supply unit 11 to the decomposition unit 6 at a rate of 150 mL / min, and a DC voltage of 25 V was applied by the oxidant generation unit 7. After the above decomposition step, the washing water was discharged outside the washing machine.

  In order to confirm the purification effect of the washing water, the total organic carbon concentration (hereinafter referred to as TOC) of the washing water before and after the decomposition step was measured with a TOC meter (TOC-5000A) manufactured by Shimadzu Corporation. In Example 1, since the TOC of the cleaning water after completion of the decomposition process exceeded 5% of the TOC before purification, 25 L of clean water was newly added to the washing tub 1 and an additional rinsing process was performed once. . The additional rinsing water was also passed through the decomposition means 6 at a flow rate of 4 L / min and returned to the washing tub 1 for 1.5 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was introduced from the electrolyte supply unit 11 to the decomposition unit 6 at a rate of 150 mL / min, and a DC voltage of 25 V was applied by the oxidant generation unit 7. After the decomposition process, the rinse water was discharged outside the washing machine.

  In addition, as Comparative Example 1, a washing machine that does not reuse conventionally used washing water (amount of water used: washing process 30L, rinsing process 25L × 2 times, total 80L), Comparative Example 2 is described in Patent Document 2. As shown in the figure, the effect of reducing the amount of source water used by a washing machine that purifies and reuses washing water using zeolite coated with manganese oxide as an absorption filter material was shown. Further, as Comparative Example 3, the same verification method as described above was carried out for a washing machine in which the catalyst 4 is removed from the washing machine shown in FIG. did. This also applies to the following embodiments.

  The results of verification are shown in Table 1 (Example 1). By carrying out the decomposition step, the amount of source water used was reduced by about 30% compared to a washing machine that does not reuse washing water (Comparative Example 1). In the washing machine of the present embodiment, the purification effect of washing water and waste water was hardly reduced even after repeating the verification experiment five times, whereas in the washing machine of Comparative Example 2, the absorption filter material was Contaminants were not sufficiently discharged, and the purification effect with repeated use was greatly reduced. In addition, compared with a washing machine (Comparative Example 3) in which the entire amount of the catalyst 4 is installed below the lower end of the anode 8, hypochlorous acid generated by electrolysis is efficiently consumed, and organic pollutants are oxidized. The cleaning water purification effect by denaturation and / or oxidative decomposition was higher.

  In addition, instead of the anode and the cathode and the power supply unit in the present embodiment as the oxidant generation means 7, an ozone generator (ozone generation amount 1000 mg / h) is used, and the generated ozone is stored in the decomposition means 6. The same effect of reducing the amount of source water used can also be obtained by adopting a configuration in which the water is aerated and the cleaning water decomposition step is performed for 20 hours and the rinsing water decomposition step is performed for 2 hours. However, when the ozone generator is used, the device configuration becomes large (the ozone generator 300 × 250 × 400 mm with respect to the direct current power supply 150 × 50 × 150 mm of this embodiment), and the installation property is not good, so that the oxidant is generated. As the means 7, it is more preferable to use an anode, a cathode, and a power supply unit.

Example 2
The effect of reducing the amount of water used by the washing machine shown in FIG. 1 was verified. The verification method is as follows. The configuration is the same as in the first embodiment.
30 L of washing water containing 200 ppm of linear alkylbenzene sulfonate (hereinafter referred to as LAS) as a detergent component was passed through the decomposition means 6 at a flow rate of 4 L / min, and the decomposition step of returning to the washing tub 1 was continued for 10 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was charged from the electrolyte supply means 11 to the decomposition means 6 at a rate of 150 mL / min. A step of applying a DC voltage of 25 V for 3 minutes by the oxidant generating means 7 and then stopping the voltage application for 2 minutes was repeatedly performed. After the above decomposition step, the washing water was discharged outside the washing machine.

  In order to confirm the purification effect of the washing water, the TOC of the washing water before and after the completion of the decomposition process and the washing water discharged from the washing machine containing desorbed organic contaminants was measured. Also in Example 2, since the TOC of the cleaning water after the decomposition step exceeded 5% of the TOC before purification, 25 L of clean water was newly added to the washing tub 1 and an additional rinsing step was performed once. . The additional rinsing water was also passed through the decomposition means 6 at a flow rate of 4 L / min and returned to the washing tub 1 for 1.5 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was charged from the electrolyte supply means 11 to the decomposition means 6 at a rate of 150 mL / min. A step of applying a DC voltage of 25 V for 3 minutes by the oxidant generating means 7 and then stopping the voltage application for 2 minutes was repeatedly performed. After the decomposition process, the rinse water was discharged outside the washing machine.

  The results of verification are shown in Table 1 (Example 2). When the voltage application is divided and performed in the decomposition process, the generated hypohalous acid is efficiently used for oxidative modification and / or oxidative decomposition of organic contaminants, and the voltage application is performed continuously (Examples) The cleaning water purification effect equivalent to 1) was obtained. As a result, it was possible to reduce power consumption by 40% compared to Example 1. In addition, about the washing machine in this Embodiment, even if it repeated verification experiment 5 times, the purification effect of washing water hardly fell.

Example 3
The effect of reducing the amount of water used by the washing machine shown in FIG. 2 was verified. The verification method is as follows.
A polyester diaphragm 18 was installed in the decomposition means 6 and partitioned into an anode chamber and a cathode chamber. As the catalyst 4, 20 g of a titanium oxide-supported ruthenium catalyst (metal amount: 3%) was placed in the anode chamber. A throwing heater was used as the decomposition system heating means 16. The decomposition system heating control means 17 is composed of a thermocouple and a microcomputer (not shown) put in the decomposition means 6, and the temperature of the catalyst 4 is controlled. Other configurations are the same as those in the first embodiment.
30 L of washing water containing 200 ppm of linear alkylbenzene sulfonate (hereinafter referred to as LAS) as a detergent component was passed through the decomposition means 6 at a flow rate of 4 L / min, and the decomposition step of returning to the washing tub 1 was continued for 8 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was charged from the electrolyte supply means 11 to the decomposition means 6 at a rate of 150 mL / min. A DC voltage of 25 V was applied by the oxidant generating means 7. The catalyst 4 accommodated in the decomposition means 6 was heated to 80 ° C. by the decomposition system heating means 16. After the above decomposition step, the washing water was discharged outside the washing machine.

  In order to confirm the purification effect of the washing water, the TOC of the washing water before and after the completion of the decomposition process and the washing water discharged from the washing machine containing desorbed organic contaminants was measured. Also in Example 2, since the TOC of the cleaning water after the decomposition step exceeded 5% of the TOC before purification, 25 L of clean water was newly added to the washing tub 1 and an additional rinsing step was performed once. . The additional rinsing water was also passed through the decomposition means 6 at a flow rate of 4 L / min and returned to the washing tub 1 for 1 hour. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was charged from the electrolyte supply means 11 to the decomposition means 6 at a rate of 150 mL / min. A DC voltage of 25 V was applied by the oxidant generating means 7. The catalyst 4 accommodated in the decomposition means 6 was heated to 80 ° C. by the decomposition system heating means 16. After the decomposition process, the rinse water was discharged outside the washing machine.

  The verification results are shown in Table 1 (Example 3). By installing the diaphragm 18 in the decomposition means 6 and the catalyst 4 in the anode chamber, the hypohalous acid produced near the anode and having strong oxidizing power under acidic conditions can oxidize organic pollutants. As a result, it can be efficiently used for modification and / or oxidative decomposition, and as a result, the power consumption can be reduced by 20% compared to the case without the diaphragm (Example 1). In addition, about the washing machine in this Embodiment, even if it repeated verification experiment 5 times, the purification effect of washing water hardly fell.

Example 4
The effect of reducing the amount of source water used by the washing machine shown in FIG. 3 was verified. The verification method is as follows.
The adsorption means 20 is made of SUS304 and has an internal volume of 1.5L. As the adsorbent 19, fibrous activated carbon 500mL (specific surface area 2000m2 / g, pore volume 0.75mL / g, specific gravity about 0.1g / mL) was used. A band heater was used as the adsorbent regeneration means 21, and the temperature of the adsorbent 19 was controlled by a thermocouple and a microcomputer (not shown) introduced into the adsorption means 20. Moreover, as the pressure holding means 22, a stainless steel solenoid valve was used. Other configurations are the same as those in the first embodiment.
The adsorbing and decomposing step of passing 30 L of washing water containing 200 ppm of LAS as a detergent component through the adsorbing means 20 and the decomposing means 6 at a flow rate of 4 L / min and returning them to the washing tub 1 was continued for 3 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was charged from the electrolyte supply means 11 to the decomposition means 6 at a rate of 150 mL / min. A step of applying a DC voltage of 25 V for 3 minutes by the oxidant generating means 7 and then stopping the voltage application for 2 minutes was repeatedly performed. The catalyst 4 accommodated in the decomposition means 6 was heated to 80 ° C. by the decomposition system heating means 16.

After completion of the adsorption decomposition step, 1 L was left in the adsorption means 20 and discharged outside the washing machine, the pressure holding means 22 was closed, and the adsorbent 19 was heated at 250 ° C. for 1 hour by the adsorbent regeneration means 21. After cooling the adsorbent 19 to 100 ° C. or lower, the pressure holding means 22 was opened, and the washing water containing the desorbed organic contaminants was discharged outside the washing machine.
In order to confirm the purification effect of the washing water, the TOC of the washing water before and after the completion of the decomposition process and the washing water discharged from the washing machine containing desorbed organic contaminants was measured.

  The verification results are shown in Table 1 (Example 4). By carrying out the adsorption step, part of the organic contaminants contained in the washing water is removed in advance by the decomposition means 6, and as a result, it is shorter than when the adsorption step is not carried out (Examples 1 to 3). It became possible to carry out cleaning water purification by electrolysis over time. Furthermore, since the TOC of the cleaning water after the completion of the decomposition process has reached about 5% before purification, no additional rinsing process is required, and the amount of source water used is reduced by about 60% compared to the conventional (Comparative Example 1). I was able to. In addition, about the washing machine in this Embodiment, even if it repeated verification experiment 5 times, the purification effect of washing water hardly fell.

Example 5
The effect of reducing the amount of source water used by the washing machine shown in FIG. 4 was verified. The verification method is as follows.
The amount of fibrous activated carbon that is the adsorbent 19 was 300 mL. Other configurations are as described above.
The decomposition / adsorption process in which 30 L of washing water containing 200 ppm of LAS as a detergent component was passed through the decomposition means 6 and the adsorption means 20 at a flow rate of 4 L / min and returned to the washing tub 1 was continued for 3 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was charged from the electrolyte supply means 11 to the decomposition means 6 at a rate of 150 mL / min. After applying a DC voltage of 25 V for 3 minutes by the oxidant generating means 7, the step of stopping the voltage application for 2 minutes was repeated. The catalyst 4 accommodated in the decomposition means 6 was heated to 80 ° C. by the decomposition system heating means 16.

After completion of the decomposition and adsorption process, 1 L was left in the adsorption means 20 and discharged outside the washing machine, the pressure holding means 22 was closed, and the adsorbent 19 was heated at 250 ° C. for 1 hour by the adsorbent regeneration means 21. After cooling the adsorbent 19 to 100 ° C. or lower, the pressure holding means 22 was opened, and the washing water containing the desorbed organic contaminants was discharged outside the washing machine.
In order to confirm the purification effect of the washing water, the TOC of the washing water before and after the completion of the decomposition process and the washing water discharged from the washing machine containing desorbed organic contaminants was measured.

  The verification results are shown in Table 1 (Example 5). After the denaturation and / or decomposition by the decomposing means 6, the adsorption process by the adsorbing means 20 is carried out, so that the washing is performed by electrolysis in a shorter time compared to the case where the adsorption process is not performed (Examples 1 to 3) It became possible to carry out water purification. Further, the cleaning water can be purified with a small amount of the adsorbent 19 as compared with the case where the adsorption step is performed before the modification and / or decomposition by the decomposition means 6 (Example 4). It was. Furthermore, since the TOC of the cleaning water after the completion of the decomposition process has reached about 5% before purification, no additional rinsing process is required, and the amount of source water used is reduced by about 60% compared to the conventional (Comparative Example 1). I was able to. In addition, about the washing machine in this Embodiment, even if it repeated verification experiment 5 times, the purification effect of washing water hardly fell.

Example 6
The effect of reducing the amount of source water used and the effect of purifying wastewater of the washing machine shown in FIG. 5 was verified. The verification method is as follows. The water storage tank 23 is made of polyethylene and has an internal volume of 25 L. As the water storage tank valve 24, a drain valve for a conventional washing machine is used. Other configurations are as described above.
An adsorption process in which 30 L of washing water containing 200 ppm of LAS as a detergent component was passed through the adsorption means 20 and the decomposition means 6 at a flow rate of 4 L / min and returned to the washing tub 1 was continued for 3 hours. During the first 7.5 minutes of the decomposition step, an aqueous sodium chloride solution was introduced from the electrolyte supply unit 11 to the decomposition unit 6 at a rate of 150 mL / min, and a DC voltage of 25 V was applied by the oxidant generation unit 7.

After completion of the adsorption decomposition process, 1 L in the adsorbing means 20 and 20 L in the water storage tank 23 are left, the washing water is discharged to the outside of the washing machine, the pressure holding means 22 is closed, and the adsorbent 19 is adsorbed by the adsorbent regeneration means 21. Was heated at 250 ° C. for 1 hour. After the adsorbent 19 was cooled to 100 ° C. or lower, the pressure holding means 22 was opened, and the washing water containing the desorbed organic contaminants was discharged to the decomposition means 6. Subsequently, 30 mL of sodium chloride aqueous solution is added to the decomposition means 6 from the electrolyte supply means 11, and a DC voltage of 25 V is applied for 3 minutes by the oxidant generation means 7, and then the voltage application is stopped for 2 minutes repeatedly for 7 hours. did. Thereafter, the treated water obtained was discharged out of the washing machine together with 20 L of water stored in the water storage tank 23.
In order to confirm the purification effect of the washing water, the TOC of the washing water before and after the decomposition step and the washing water discharged to the outside of the washing machine were measured.

  The verification results are shown in Table 1 (Example 6). As shown in Table 1, the TOC in the wastewater discharged to the outside of the washing machine is the amount of organic pollutants desorbed after heating of the washing water (Comparative Example 1) when the adsorption and decomposition processes are not performed at all. It showed a low value compared with the waste water (Examples 4 and 5) in the case where the denaturation and / or decomposition process was not carried out, and the waste water was discharged outside the washing machine while suppressing the load on the waste water treatment. In Comparative Example 2, it was difficult to regenerate due to insufficient desorption and decomposition of contaminants from the absorption filter medium.

  Table 1 shows the relationship between the source water usage reduction effect and the drainage purification effect in the washing machine of the present invention. For the washing machine of the present invention, even if the verification experiment was repeated five times, the purification effect of washing water and waste water was hardly lowered.

  The washing machine according to the present invention is useful as a washing machine that reduces the amount of source water used. Moreover, it can be applied to a washing machine that improves the effect of removing the surfactant from the clothing in the rinsing step by modifying the surfactant. Furthermore, the present invention can be applied to a washing machine that suppresses environmental load and drains water outside the washing machine. Further, it can be similarly applied to various cleaning apparatuses that perform cleaning using a surfactant.

Cross-sectional schematic diagram of a washing machine in Embodiment 1 of the present invention Cross-sectional structure schematic diagram of the washing machine in Embodiment 2 of this invention Cross-sectional structure schematic diagram of the washing machine in Embodiment 3 of this invention Cross-sectional structure schematic diagram of the washing machine in Embodiment 4 of this invention Cross-sectional structure schematic diagram of the washing machine in Embodiment 5 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 2 Drainage port 3 Pump 4 Catalyst 5 Catalyst holding means 6 Decomposition means 7 Oxidant production | generation means 8 Anode 9 Cathode 10 Power supply part 11 Electrolyte supply means 12 Oxidant removal means 13 Switching valve 14 Water supply port 15 Outside the washing machine 16 Decomposition system heating means 17 Decomposition system heating control means 18 Diaphragm 19 Adsorbent 20 Adsorbing means 21 Adsorbent regeneration means 22 Pressure holding means 23 Water storage tank 24 Water storage tank valve

Claims (12)

A drain outlet installed in the washing tub to discharge the washing water,
A decomposing means for storing a catalyst and bringing the wash water discharged from the drain port into contact with the catalyst to form treated water;
A washing machine comprising: an oxidizing agent generating unit that generates an oxidizing agent in the washing water that contacts the catalyst in the decomposition unit; and a water supply port that supplies the treated water to the washing tub. The oxidant generating means has at least a pair of an anode and a cathode installed in the decomposition means, and at least a power supply unit for supplying power to the anode and the cathode,
The washing machine according to claim 1, wherein a voltage is applied to the washing water stored in the disassembling means to perform electrolysis.   The washing machine according to claim 2, wherein when the electrolysis of the washing water is performed by the oxidant generating means, at least a part of the catalyst is installed above the lower end of the anode.   4. The washing machine according to claim 2, wherein the oxidant generating unit further includes an electrolysis control unit, and the voltage application to the washing water is divided into two or more times. 5.   It further has an electrolyte supply means for supplying a halogen salt to the washing water stored in the decomposition means, and at least a part of the oxidizing agent generated by the oxidizing agent generating means is hypohalous acid. The washing machine according to any one of claims 2 to 4.   The interior of the decomposition means is partitioned into an anode chamber containing the anode and a cathode chamber containing the cathode by a diaphragm, and the catalyst is installed in the anode chamber. A washing machine according to any one of the above.   The washing machine according to any one of claims 1 to 6, further comprising a decomposition heating means for heating the catalyst accommodated in the decomposition means.   The oxidant removal means which removes the said oxidant contained in the said treated water in the flow path of the said treated water between the said decomposition | disassembly means and the said water supply port is further described in any one of Claims 1-7. Washing machine.   The washing water flow path between the drain outlet and the decomposition means or the treated water flow path between the decomposition means and the water supply inlet is filled with an adsorbent, and the washing water or the treatment The washing machine according to any one of claims 1 to 8, further comprising adsorption means for filtering water.   The washing machine according to claim 9, further comprising an adsorbent regeneration unit that discharges contaminants adsorbed from the washing water by the adsorbent from the adsorbent.   A pressure holding means for sealing the adsorbing means, wherein the adsorbent regeneration means seals the adsorbing means with the pressure holding means in a state where at least a part of the adsorbent is in contact with water, and After the agent is heated to 100 ° C or more and 250 ° C or less, the pressure holding unit is opened, and the mixture of the contaminants and the water discharged from the adsorbent is discharged from the adsorbing unit. Item 11. A washing machine according to Item 9 or 10. The adsorbing means is installed in a flow path of the washing water between the drain port and the decomposition means,
Further, a water storage tank is provided in the flow path of the wash water between the drain port and the adsorption means, or in the flow path of the treated water between the decomposition means and the discharge port of the treated water to the outside of the washing machine. And
The decomposition means contacts the mixture discharged from the adsorbing means with the water with the catalyst and the oxidizing agent generated in the washing water to form treated wastewater, and then treats the treated wastewater with the The washing machine according to any one of claims 9 to 11, wherein the washing machine is discharged together with the water stored in the water storage tank to the outside of the washing machine.

Images